Siargao is paradise for surfers--- and non-surfers, too. If you don't surf, there's more to Siargao then just surfing. Of course, I would highly recommend that you make 'learn to surf' a top priority on your itinerary, but if it's really not your thing, here are some activities you can do beyond surfing.
Siargao is (so far) my favorite island in the Philippines, and is considered as the Surfing Capital of the Philippines. Most of the tourist activity is centered in General Luna in Siargao, and there are plenty of gems in the area to dine, party, and do activities. If it's your first time to visit the beautiful island, this blog will help you identify the must-sees.